The place is incredible. My wife and I stayed for 3 days with no complaints. Air conditioning, fast wifi, pool, fridge, etc. Very clean, as well, with every amenity we could think of. The biggest bonus was the water filter we could use to refill our water bottles. Saved us a lot of trouble dealing with finding water and buying/wasting water bottles.
Just as important, we were conveniently located close to the National Stadium BTS station, MBK mall, Thompson museum (which we hadn't heard of but was nice), and other things. The apt is also along a canal, across which you can see the real Bangkok.
Kong was a great host, very accommodating, and I would certainly stay here again if in Bangkok. Thanks Kong!